Very interesting question
As we know that there are many channels that can easily generate leads. but while talking most effective channels, only one channel that comes to my mind is Email marketing.
Email Marketing is one of the best channels for lead generation. Choosing the right marketing channel will help you get that ROI.
Email marketing comes in many forms:
1) Drip campaigns
Drip campaigns are a kind of automation, that is a set of emails that go out based on specific timelines or user actions. It provides the facilities to enable you to stay in touch with groups of people based on events like when a user signs up for an account or how often that user visits your site.
A newsletter is a tool used by businesses and organizations to share relevant and valuable information with their network of customers, prospects, and subscribers.